Valve-gear.



, wanted Nov.22',1910.

J. G. BLUM, VALVE GEAR. ArPLlcAfrIoH FILED un. 2, '1910.

Z knjrrnsss l j ion .an enlarged scale, of the same, detach "1139. that-,the general rin'cip'le of my improved '40 opposite side being'siniilar, I provide a double armed lever, 1, cofiiposed of two parallel' UNITED STATES PATENT OFFICE,

JAMES d. BLUNT, or scnnlvnc'ramr, NEW Yoax.,

vALvn-GEARQ "To whom 'it imyconcern:

specification of Letters Patent,- Patented N ov. 22, l'l. Application led March 2, 1910. Serial No. 546,761. I

. change the direction of movement or oint ,l Beit yknown that I, TA-Mns G. BLUNI'iQ of of cut olf.; oscillatory reverse sha 6; Schenectady, in the county of Schenectady Ais journaled 1n brackets, 7, secured to theenand State of New York, 'have invented a g :ne frame, and' is connected by'a down- 6o 5 certain new and vusefuldmprovement in wardly de ending reverse arm, 6*, fixed Valve-Gears, of which improvement the following is a specification.

uponit, an by a reachrod, 8, coupled there-- to, with Ta' reverse lever (not shown) in the My invention'inore' articularly relates'to cab of the locomotive, by the movement of v locomotive engine va ve gearsof the sowhichvlever, the reverse shaft maybe rocked 65 called radial type, and its object is to roin itsbearings, in the ordinary manner. 'lhe vide a valve gear of such vtype whichw 'le lower arm'of'thc lever,1, isceupled, by an embodying all the advantages of those now eccentric rod, 9, to an eccentric crank, or

in service, shall attain the additional ones of. return crank, 1t), fixed upon one of the drivx simplicity -and economyl of construction and ing wheels, 11, of the locomotive: 70

maintenance, requiring only. such' machine Anarm, 6", 1s fixed vu on the reverseshaft, 1

` work as canjbe effected on lathes or boring 6, adjacent tocaeh'of ,its ends,-and is coumills,andin its.practice, of producing si; 'pled,by a rod, 5, tq'the radius bar, 5, ative movement at all points of cut-o by; short .distance in rear of the link, 4. -The avoiding the slip of the ordinary link block.

forward end of the radius bar -is coupled to 75 .'llie .im 'rovementl claimed is `hereinafter the upper endof.a combinationleveigf 12, v.

fully set o rth. J

the lower end .of which is coupled, by acom- In the accompanyingdrawings'Figure `J. bination link, 12 vto the adjacent cross head,

is a-'side view Aof a-valve' gear illustratin 'an 13, ofthe locomotive.- A valve stem, 14,

embodiment of my inventioinas appli on upon whichwis' yfixed a -steam distribution 80 u locomotive engine; Fig-2, az:similarv'iev valve, 15, which is here shown as ofthe in from'- its su port; 3", an end view; and, f l" 4,' a p an orfop view, partly 1n section. ie

side admission'piston ty but which mayV be o f any other known an .preferred form, is coupled to the combination lever, l2, tho

ferring to the drawings, it will be seen valve, 15, controlling-the admission and ex- 8,5

haust vofv steam to and from the adjacent valvcffgear accor s with that of the Well cylinder, 16, of the locomotive.

' known lValschaert gear, which has been introduced to a. large extent in railroad service,.it bein actuated by connections with a return cralcon a locomotive driving wheel,

:md with a cross hcadyrcspectively. i'

` ln the Practice of my invention, the 'deseription of which is iliade of the gear on one side only of the locomotive, that .on the o side plates, rovidcd with trunnions, 2, which are ourna 'ed in bearings in va supportin e brac et, fsuitably secured tothe rame o the locomotive. A link, 4, composed of two side )lates connected by intermediate webs -01 rj S, S-'l 'the' lever, 1, and isjournaled, at its middle,

'on a substantiall "horizontal'radiusvbar, 5.

The lower armo the link, .4, is coupled, by 'ay rod, to the lower arm of the'lever, 1, and

the per arm of the link is coupled, by a.

" rod, 4", lt'ofthe' u per arm of said leverthev rods, i4." and 4-, i ing of un u'all lengt so" as to effect a substantially ra ial movement of the link when the radius bar isfmoved- 1n.

In the operation'of a valve gearsubstan'- tially as above described, the radius bar, 5,

. is raised or lowcredby the reverse shaft,- 6,

when rocked in itsbcarings by the reverse lever, in accordance 'with the desired direc'- n t'fn of movement' of 'the locomotive and to an extent gevel-noch' by the degree of expansion or point of-cut`off to be effected. The -movemcnt of the radius bar, ineither direction, 'will move the pins connectinv the radius bar, 5, with the link, 4, out of Iline with the axis of the trunnions, 2, of the lever,l l

'1,-and the movement of theretu rn crank. i00- 10, which isc'rigidl 'connected to the driving' wheel, 11, wil effect/1a corresponding',

coated. between lthe side plates of but reduced, ,degree `of 'longitudinal Inovementfof the radiusl bar, 5. Thismove! 'nientfin 'combination with the .movement 105 of the cross head, '113,' which is connected to the lf'sombination" .)leveig 12, b the coinbination link, 12',`recpro-cates t e distribution valve, 15, toei'ect the' admission and.

exhaust of steam'to and fromthev cylindeigllo" 16 as in the operation of the 'Walschaert valve gear.

It .will befseen that, under my invention, the radius bar is connected positively to the operating rod,- instead of through the inter'- 'mediation ofa block sliding in a segmental -linkasfin'v the Ordinar construction, and thereforeJ that as thesl ip of a block in a link is avoided, positiivemovement is imparted to '-the radlus rod and connected distribution valve, in' any and` all positions to which theradius rod may be moved for adjusfmentI of the point of cut off in either forward or backm'otion.v Further, as only pin or pivotal connections of the operatin members are jrequired, they may he vitte with an economy o f machine shop work, and

maintained :in operationat minimum cost.

-' I claim as my invention and desire to se.

cure. by Letters. Patent: 1

the. radiusbar relatively to the eccentricv1. Thevl combinationi', in a steam engine valve gear ofthe radial-'.type, of 'an eccentric I crank.

2. The"combination, in a steam engine f valve gear of the-radial tvne, of an'eccentric'V crank, faradlus bar a valve stem coupled to the-radius bar, al d ouble armed link jour- :nal'ed centrally on the radiuspbar andpositively connected to,tl\e eccentric crank at its ends, and an oscillatory reverse shaft adapted to impart movement to said. radius bar .relatively to theleecentric crank.

3. The combination, ina steam engine valve ge'ar of the radial type, of an eccentric crank, a. radius bar, a valve stem coupled to the radius bar, a double armed leverjournaled in fixed bearings 1and .coupled at one end to the eccentric crank, a double armed'link coupled,'at' its opposite ends to opposite arms of the lever, and coupled intermediately to the radius bar, and an oscillatoryreverse shaflcarrying'an arm coupled to the radiusbar.

`4. The combination,' in a steam4 engine valve gear of the1rad1al'type, ofv an eccentric crank, a4 radius bar, -a valve stem coupled to the radius bar, a double armed lever journaled4 in- .fixed bearings .and .coupled at one end to the eccentricrank, a double armed link -journaled on the radius bar, vcoupling rods o f:unequal length connecting the arms off the link to the arms of the lever, and means-for impartingmovement to the radius bar relatively to the eccentric crank.

. JAMES e. BLUNT.

' ,Witnessesz J. SNowDEN BnLL,-.

E. M. Horner." 

